pl23_cgs01981.jpg
![U cgs01981.jpg U](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs01981.jpg)
Image
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https://www.noaa.gov/media/digital-library-photo/pl23cgs01981jpgDescription
U. S. Coast and Geodetic Survey reference mark pointing to triangulation stationmarker.
Collection
Historic Coast & Geodetic Survey